Mark Mulcahy is an American musician. He was the front-man for the New Haven, Connecticut-based band Miracle Legion. The band earned modest renown, especially in their native New England region. Mulcahy soon formed Polaris, a house band for the mid-1990s alternative television series The Adventures of Pete & Pete. They are best remembered for the song "Hey Sandy" featured in the opening credits of each show, and for nostalgic tunes such as "Waiting for October" and "Saturnine". Following the cancellation of Pete & Pete, Mulcahy began playing his own shows in New York City and rebuilding his career. Mulcahy has opened for notable artists, including Oasis and Jeff Buckley and received homage from Radiohead frontman Thom Yorke, who dedicated a song to Mulcahy at a Boston show.
An essay on Mulcahy's song "Hey Self-Defeater" was featured in Nick Hornby's book Songbook.
In 2003, Mulcahy was invited to sing a Haiku poem, "Haiku Three In The Museum Garden", by Nobel laureate George Seferis, on the international release of electronica band Sigmatropic Sixteen Haiku & Other Stories.